The invention discloses a rice seedling raising peat soil matrix plate as well as a preparation method and manufacturing machine of a rice seedling raising peat soil matrix plate and relates to a seedling raising matrix plate as well as a preparation method and manufacturing method of the seedling raising matrix plate. By using the rice seedling raising peat soil matrix plate, the problems that corrosive soil is excessively excavated and the sustainable development requirement cannot be met because China lags behind in rice seedling raising technology and a method for raising seedlings on a soil bed is still used are solved. The rice seedling raising peat soil matrix plate is prepared from coarse peat soil, fine peat soil, coconut shell powder and paper pulp. The preparation method comprises the steps of firstly, weighing raw materials; secondly, pulping; thirdly, grinding to form pulp; and fourthly, preparing a primarily-molded matrix plate, and then, drying. The manufacturing machine comprises a fixed disk (8), a rotary disk (9), a manufacturing machine shell (6), a rotating shaft, a motor, a sealing plug (5), a closing plug (12) and a plate manufacturing mold (7). The rice seedling raising peat soil matrix plate is manufactured by using an industrial method, so that the time and the labor are saved, and the efficiency is high.